# P4 OCR today Watch

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I felt this exam was really badly timed, and I have no idea what the hell the end of the last question was about.

I reckon I'm looking at a low C, it's times like these I ask myself, how the hell am I going to make any of my offers? and why the hell am I doing a Maths degree?

I reckon I'm looking at a low C, it's times like these I ask myself, how the hell am I going to make any of my offers? and why the hell am I doing a Maths degree?

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#2

(Original post by

I felt this exam was really badly timed, and I have no idea what the hell the end of the last question was about.

I reckon I'm looking at a low C, it's times like these I ask myself, how the hell am I going to make any of my offers? and why the hell am I doing a Maths degree?

**fishpaste**)I felt this exam was really badly timed, and I have no idea what the hell the end of the last question was about.

I reckon I'm looking at a low C, it's times like these I ask myself, how the hell am I going to make any of my offers? and why the hell am I doing a Maths degree?

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#3

**fishpaste**)

I felt this exam was really badly timed, and I have no idea what the hell the end of the last question was about.

I reckon I'm looking at a low C, it's times like these I ask myself, how the hell am I going to make any of my offers? and why the hell am I doing a Maths degree?

The first time I did Pure 4, I got a garbage mark, took it again in the June period and upped it to a B, mainly because by the time you have done other units the stuff from previous books is somewhat routine.

Plenty of time for recovery, and you're probably being harsh on yourself anyway, some form of prudence.

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#4

**fishpaste**)

I felt this exam was really badly timed, and I have no idea what the hell the end of the last question was about.

I reckon I'm looking at a low C, it's times like these I ask myself, how the hell am I going to make any of my offers? and why the hell am I doing a Maths degree?

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#5

(Original post by

Be calm, be calm.

The first time I did Pure 4, I got a garbage mark, took it again in the June period and upped it to a B, mainly because by the time you have done other units the stuff from previous books is somewhat routine.

Plenty of time for recovery, and you're probably being harsh on yourself anyway, some form of prudence.

**Expression**)Be calm, be calm.

The first time I did Pure 4, I got a garbage mark, took it again in the June period and upped it to a B, mainly because by the time you have done other units the stuff from previous books is somewhat routine.

Plenty of time for recovery, and you're probably being harsh on yourself anyway, some form of prudence.

if u perosnally, did THAT bad, then theres always resitting.

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#6

**fishpaste**)

I felt this exam was really badly timed, and I have no idea what the hell the end of the last question was about.

I reckon I'm looking at a low C, it's times like these I ask myself, how the hell am I going to make any of my offers? and why the hell am I doing a Maths degree?

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#7

(Original post by

lol. Just finsihed the OCR P1 exam, and I am thinking how on earth did I manage a B last time? Its pathetic, I finsihed P1 in half an hour and just checked my answers for the remaining hour or so. Its the luck of the draw to be honest. Sometimes the papers are difficult, and other times, they are just sooo easy, that its comical.

**Bhaal85**)lol. Just finsihed the OCR P1 exam, and I am thinking how on earth did I manage a B last time? Its pathetic, I finsihed P1 in half an hour and just checked my answers for the remaining hour or so. Its the luck of the draw to be honest. Sometimes the papers are difficult, and other times, they are just sooo easy, that its comical.

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#8

**Bhaal85**)

lol. Just finsihed the OCR P1 exam, and I am thinking how on earth did I manage a B last time? Its pathetic, I finsihed P1 in half an hour and just checked my answers for the remaining hour or so. Its the luck of the draw to be honest. Sometimes the papers are difficult, and other times, they are just sooo easy, that its comical.

my sister cud hav got an A Grade on that. unbelievable.

saying that, the boundaries will be higher for easier paper, so in theory it shud all be fair. (thats another matter in practice though)

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(Original post by

if it was a hard paper then the mark bondaires will be more lenient.

**bono**)if it was a hard paper then the mark bondaires will be more lenient.

Perhaps you'd like to have a go at this one,

w[1] = -1 - rt3 i

w[2] = -1 + rt3 i

w[3] = 2

What's the significance of the loci of the complex number z, |z-w[2]| = |z -w[3]| to w[3]?

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#10

(Original post by

Most normal people go through this. There's no need to panic, as you have plenty of time to rectify the exam.

**Bigcnee**)Most normal people go through this. There's no need to panic, as you have plenty of time to rectify the exam.

btw: i just wanted to know.

"find the least value of x^2 - 12x + 40"

we finsihed Pure 1 a while ago, i am not revisin or anythin, just i saw this question and my memory is blank.

please cud u poit me in the right direction?

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(Original post by

ditto. Physics module 1 exam 2day, it was pretty disgraceful.

my sister cud hav got an A Grade on that. unbelievable.

saying that, the boundaries will be higher for easier paper, so in theory it shud all be fair. (thats another matter in practice though)

**bono**)ditto. Physics module 1 exam 2day, it was pretty disgraceful.

my sister cud hav got an A Grade on that. unbelievable.

saying that, the boundaries will be higher for easier paper, so in theory it shud all be fair. (thats another matter in practice though)

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**Bhaal85**)

lol. Just finsihed the OCR P1 exam, and I am thinking how on earth did I manage a B last time? Its pathetic, I finsihed P1 in half an hour and just checked my answers for the remaining hour or so. Its the luck of the draw to be honest. Sometimes the papers are difficult, and other times, they are just sooo easy, that its comical.

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#13

(Original post by

It wasn't necessarily hard, straight forward enough questions, just, the speed required to get through it all meant I was not able to finish, and I was making ridiculous mistakes. I found myself missing out things like partial fractions questoins which take a few mins and are tedious so I could scrape all the 3 mark questions which can be done in seconds.

Perhaps you'd like to have a go at this one,

w[1] = -1 - rt3 i

w[2] = -1 + rt3 i

w[3] = 2

What's the significance of the loci of the complex number z, |z-w[2]| = |z -w[3]| to w[3]?

**fishpaste**)It wasn't necessarily hard, straight forward enough questions, just, the speed required to get through it all meant I was not able to finish, and I was making ridiculous mistakes. I found myself missing out things like partial fractions questoins which take a few mins and are tedious so I could scrape all the 3 mark questions which can be done in seconds.

Perhaps you'd like to have a go at this one,

w[1] = -1 - rt3 i

w[2] = -1 + rt3 i

w[3] = 2

What's the significance of the loci of the complex number z, |z-w[2]| = |z -w[3]| to w[3]?

no, Physics Module One. (physics, well, thats debatable....physics is supposed to b hard)

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(Original post by

perhaps i wont!

no, Physics Module One. (physics, well, thats debatable....physics is supposed to b hard)

**bono**)perhaps i wont!

no, Physics Module One. (physics, well, thats debatable....physics is supposed to b hard)

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#15

(Original post by

if u perosnally, did THAT bad, then theres always resitting.

**bono**)if u perosnally, did THAT bad, then theres always resitting.

If, say you have got a low A on one unit, and feel that after nearly 2 years you can pick up some more marks to make more secure the A Grade overall, I know which unit I'd pick to retake.

In Further Maths I would have quite happily taken B grades all the way through, and duly did so on Discrete/Decision 1, but felt that I could pick up another 5 or 6 marks, which overall can make the huge difference - I went from a 76 to a 92.

It was either going to be sit D1 again, or sit P6 again - and I knew where the easier gain in marks was going to come from.

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#16

(Original post by

correctomundo.

btw: i just wanted to know.

"find the least value of x^2 - 12x + 40"

we finsihed Pure 1 a while ago, i am not revisin or anythin, just i saw this question and my memory is blank.

please cud u poit me in the right direction?

**bono**)correctomundo.

btw: i just wanted to know.

"find the least value of x^2 - 12x + 40"

we finsihed Pure 1 a while ago, i am not revisin or anythin, just i saw this question and my memory is blank.

please cud u poit me in the right direction?

(x-6)^2+4

therefore least value = 4 at x=6

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#17

(Original post by

Ah okay. What sort of questions did it ask?

**fishpaste**)Ah okay. What sort of questions did it ask?

bit on optical fibre, mainly concentrating on calculating critical angles etc. (quite few marks there)

bit on photoelectric effect (1 question was pretty clever actually, it wud hav tricked a few)

bit on spectral lines (easy, though i think i may hav made 1 silly mistake ehre...)

and last one, question 6, was a 6 marker asking u to explain evidence for E.M waves and electrons acting as both particles and waves. (duality really)

and at start, it asked about protons, neutrons etc for an atom, then ti gave u a reaction, and u had to do conservation laws 4 it. (in quarks though, so it wasnt absolutely patheticly easy lol)

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#18

(Original post by

Complete the square:

(x-6)^2+4

therefore least value = 4 at x=6

**Bhaal85**)Complete the square:

(x-6)^2+4

therefore least value = 4 at x=6

why is the least value 4, when x = 6.

so u saying that this equation can never b able to equal any number less than 4?

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#19

(Original post by

"find the least value of x^2 - 12x + 40"

we finsihed Pure 1 a while ago, i am not revisin or anythin, just i saw this question and my memory is blank.

please cud u poit me in the right direction?

**bono**)"find the least value of x^2 - 12x + 40"

we finsihed Pure 1 a while ago, i am not revisin or anythin, just i saw this question and my memory is blank.

please cud u poit me in the right direction?

f(x) = x^2 - 12x + 40

f'(x) = 2x - 12

f'(x) = 0 => 2x - 12 = 0 => 2x = 12 => x = 6

So minimum value of f(x) occurs when x = 6.

Sub x=6 into f(x)

6^2 - 12(6) + 40

= 36 - 72 + 40

= 4

So minimum value of f(x) is 4.

[edit]

**Looks at Bhaal85's answer, and can't believe that I overlooked using "Complete the Square" to find the co-ordinates of the vertex**[/edit]

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#20

(Original post by

Minimum value occurs when gradient is equal to zero, ie the turning point on a simple quadratic.

f(x) = x^2 - 12x + 40

f'(x) = 2x - 12

f'(x) = 0 => 2x - 12 = 0 => 2x = 12 => x = 6

So minimum value of f(x) occurs when x = 6.

Sub x=6 into f(x)

6^2 - 12(6) + 40

= 36 - 72 + 40

= 4

So minimum value of f(x) is 4.

**Expression**)Minimum value occurs when gradient is equal to zero, ie the turning point on a simple quadratic.

f(x) = x^2 - 12x + 40

f'(x) = 2x - 12

f'(x) = 0 => 2x - 12 = 0 => 2x = 12 => x = 6

So minimum value of f(x) occurs when x = 6.

Sub x=6 into f(x)

6^2 - 12(6) + 40

= 36 - 72 + 40

= 4

So minimum value of f(x) is 4.

but my point was, it first asks me to complete the square for the equation. i just dont see how i can find the least val. from compelting the square.

and yes, i agree, i did it like this, the minimum turning point for this quadratic equation, but the question is on about complete. square, then "hence"...

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